Methods, Systems, and Apparatuses for Narrowband Channel Allocation and Access

1. A method for a wireless device, the method comprising: encoding data for transmission over a wireless personal area network; and transmitting the data using a plurality of narrow band offset-quadrature phase shift keying (NB O-QPSK) channels, wherein the NB O-QPSK channels comprise a channel spacing of 2.5 MHz, and wherein the NB O-QPSK channels comprise center frequencies such that borders of a set of NB O-QPSK channels align with 20 MHz Wi-Fi channels.

2. The method of claim 1, wherein the NB O-QPSK channels are located in Unlicensed National Information Infrastructure-3 (UNII-3) and Unlicensed National Information Infrastructure-5 (UNII-5) bands.

3. The method of claim 2, wherein the center frequencies are: fn=5726.25 MHz+(n−1)×2.5 MHz, (1≤n≤50) for UNII-3 fn=5926.25 MHz+(n−51)×2.5 MHz, (51≤n≤250) for UNII-5.

4. The method of claim 1, further comprising: receiving a first transmission from an initiator during a first slot having a fixed frame period; determining whether a narrow band medium is busy or idle by: detecting energy during a clear channel assessment period during the first slot and after the first transmission, and comparing the energy to an energy detection threshold; and sending, when the narrow band medium is idle, a second transmission to the initiator during a second slot, the second slot having a length of the fixed frame period, wherein the clear channel assessment period is timed such that the second transmission is aligned with a beginning of the second slot.

5. The method of claim 4, wherein the first transmission comprises a poll and the second transmission comprises a response.

6. The method of claim 1, further comprising performing a ranging sequence by: negotiating, via out-of-band (OOB) channel signaling, a channel list of narrow band channels with a second wireless device, wherein the channel list that indicates available narrow band channels; selecting a first narrow band channel from the channel list using a pseudo random number generator; transmitting a first signal on the first narrow band channel; and temporarily modifying the channel list such that channels within a guard bandwidth range of the first narrow band channel are excluded for a next transmission.

7. The method of claim 6, wherein the guard bandwidth range is 20 MHz.

8. A wireless communication system comprising: an initiator configured to: determine whether a narrow band medium is busy or idle by detecting energy during a first clear channel assessment period and comparing the energy to an energy detection threshold, and send, when the narrow band medium is idle, a first transmission to a responder during a first fixed frame period; and the responder configured to: receive the first transmission, determine whether the narrow band medium is busy or idle by detecting the energy during a second clear channel assessment period within the first fixed frame period and comparing the energy to the energy detection threshold, and send, when the narrow band medium is idle, a second transmission to the initiator during a second fixed frame period.

9. The wireless communication system of claim 8, wherein the first clear channel assessment period occurs during a prior fixed frame period such that the first transmission is aligned with a beginning of the first fixed frame period.

10. The wireless communication system of claim 8, wherein the second clear channel assessment period is timed within the first fixed frame period such that the first transmission is aligned with a beginning of the second fixed frame period.

11. The wireless communication system of claim 8, wherein the first clear channel assessment occurs at most 16 μs before the first fixed frame period.

12. The wireless communication system of claim 8, wherein the second clear channel assessment occurs at most 16 μs before the second fixed frame period.

13. The wireless communication system of claim 8, wherein the initiator and the responder are further configured to perform a ranging sequence by: negotiating, via out-of-band (OOB) channel signaling, a channel list of narrow band channels with a second wireless device, wherein the channel list that indicates available narrow band channels; selecting a first narrow band channel from the channel list using a pseudo random number generator; transmitting a first signal on the first narrow band channel; and temporarily modifying the channel list such that channels within a guard bandwidth range of the first narrow band channel are excluded for a next transmission.

14. The wireless communication system of claim 13, wherein the guard bandwidth range is 20 MHz.

15. A wireless device comprising: a processor; and a memory storing instructions that, when executed by the processor, configures the wireless device to: negotiate a channel list of narrow band channels with a second wireless device, wherein the channel list that indicates available narrow band channels; select a first narrow band channel from the channel list using a pseudo random number generator; transmit a first signal on the first narrow band channel; and temporarily modify the channel list such that channels within a guard bandwidth range of the first narrow band channel are excluded for a next transmission.

16. The wireless device of claim 15, wherein the memory storing instructions further configures the wireless device to recursively update the channel list to exclude channels within the guard bandwidth range of a last transmission.

17. The wireless device of claim 15, wherein the guard bandwidth range is 20 MHz.

18. The wireless device of claim 15, wherein the memory storing instructions further configures the wireless device to: receive a first transmission from an initiator during a first slot having a fixed frame period; determine whether a narrow band medium is busy or idle by: detecting energy during a clear channel assessment period during the first slot and after the first transmission, and comparing the energy to an energy detection threshold; and send, when the narrow band medium is idle, a second transmission to the initiator during a second slot, the second slot having a length of the fixed frame period, wherein the clear channel assessment period is timed such that the second transmission is aligned with a beginning of the second slot.

19. The wireless device of claim 18, wherein the first transmission comprises a poll and the second transmission comprises a response.

20. The wireless device of claim 18, wherein the clear channel assessment period occurs at most 16 μs before the fixed frame period and lasts for at least 9 μs.